A CRF150 is way too small. My $.02, go 250 minimum & have it lowered. Then again, once you get into that range the weight in nominal from 250-525. Other cons to the 150 would be your fuel range & lack of suspension options. I'm currently riding a titled YZ250 that's jetted correctly & geared down for trail riding only. Let us know when you pull the trigger. Riding season is nearly upon us....buraap!